So roughly $146.3k. Gee I can't imagine how he'd make ends meet in a rural county in MN earning a mere 2x the median Minnesota family income (2019) and 3.6x the Federal poverty level (families of 7 in 2021). Note that the Federal poverty level isn't adjusted for the cost of living difference in, say, LA or NYC vs. in a small town in rural MN. There are people living on far less, and still relatively comfortably.
Housing there is extremely cheap (in fact I think he purchased their current house from savings before coming into relative success on YouTube, so he's not even paying a mortgage). He's saving a huge amount of money by not sending his kids to childcare ($7-12k per child per year) or private school ($5-6k per student per year), so the biggest cost of having 5 kids is just keeping them all fed. I'm sure his food budget is substantial but they're in no way going to be reduced to living on rice and beans.
Granted, he's paying property tax on two houses (which is what, like $10ish?) plus utilities (they're not living in the old house, but still, can't have the pipes freezing). But it's ridiculous to try to argue that there's no way he'd make ends meet without a trust fund allowance.